Install Android 6.0 Marshmallow on AT&T HTC One M8 [CM13]

November 13, 2015

In this guide we are going to share you the process to install Android 6.0 Marshmallow via unofficial CyanogenMod 13 on your AT&T HTC One M8. You can also follow our previous posts on installing Marshmallow on other devices using the same process and now we are repeating the process for AT&T HTC One M8. The Official release for Android 6.0 Marshmallow is going to take some time while the CM13 ROM is here for the eager users who wish to see the latest firmware on their devices without waiting for the official release.

There are multiple benefits of installing custom ROM on your AT&T HTC One M8 as it provides a wide range of customizations and limitless modifications which unfortunately you can’t find in the stock firmware. Some custom ROMs gives you freedom to overclock CPU, install tweaking mods and tons of other software to enhance device performance further you can install themes to customize the device look. Just go ahead and install the Android 6.0 Marshmallow on AT&T HTC One M8.

Note: The Android 6.0 Marshmallow ROM for AT&T HTC One M8 is currently in the testing stages and you may notice some bugs. This not an official update from manufacturer but it’s a custom ROM from third party developers so check twice before installing Android 6.0 Marshmallow via AOSP on your AT&T HTC One M8.

How to install Android 6.0 Marshmallow on AT&T HTC One M8 with CM13

Before you Begin:

Disclaimer: This tutorial includes multiple operations including Custom Rom, custom recovery etc. Follow the guide on your own risk, we are not responsible if you brick or damage your device however the chances of bricking a device are rare but you have to pay full attention on the complete guide to avoid any issues and difficulties while performing any of the above mentioned operation.

Process to install Android 6.0 Marshmallow on AT&T HTC One M8

Turn of your device and boot into TWRP custom Recovery menu by the hardware keys combination or using any third party app (Mostly found in Play store).

Once your device enters into TWRP recovery, create a Nandroid backup of your device or follow our guide to create a Nandroid backup (this will create a backup of your complete device including current firmware) if something goes wrong you can restore your previous firmware.

Once the Nandroid process completes, tap on “Wipe” and then swipe the slider from left to right to begin the wipe process (This will reset your device to factory)

Now it’s the time to flash the Marshmallow firmware on your device. Choose install and navigate to the folder in which you have copied the Marshmallow ROM zip file

Swipe across the slider to confirm install, wait for a few minutes till the file is completely installed in your device.

Once done with the above step, now apply the same process with the installation of GApps.

That’s it! You have successfully installed Android 6.0 Marshmallow via CyanogenMod 13 ROM on your AT&T HTC One M8. If you have any query feel free to contact us by posting your queries in the below provided comment section. Follow us on Facebook/Twitter/Google+ for future update.